Abstract:The leaves of three mangrove species, Kandelia candel （L.） Druce, Bruguiera gymnorrhiza （L.） Blume and Rhizophora stylosa Griff., collected from the access to Jiulong River, Fujian, were studied anatomically. Results showed that the three species were adapt to aquatic environment in structure：having thicker cuticle, epidermis with hypodermis as aquiferous tissue, stomata sunk in and distributed in lower epidermis, with large substomatal chambers, developed vascular bundles with enlarged vessels in mid rib. Cross section views indicated that leaves of K. candel was isolateral with symmetric structure, whereas those of B. gymnorrhiza and R. stylosa were dorsi-ventral and asymmetric. Leaves of all the 3 species were abundant in tannin that was richest in K. candel, followed by R. stylosa and B. gymnorrhiza. The differences in leaf structure could help specific identification in taxonomy．